Use this command to arrange the icons for minimized windows at the bottom of the main window. If there is an open document window at the bottom of the main window, then some or all of the icons may not be visible because they will be underneath this document window.
Shortcuts
Keys: CTRL + SHIFT + I
Example
If this is how the document windows look...
After the "Arrange Icons" command is executed, the icons are lined up in an orderly fashion on the bottom of the work area: